pub struct ArrayList {
    pub data: *mut ArrayListValue,
    pub length: usize,
    _alloced: usize,
}
pub type ArrayListValue = i32; // Replace with actual type
pub type ArrayListEqualFunc = extern "C" fn(ArrayListValue, ArrayListValue) -> i32;
pub type ArrayListCompareFunc = extern "C" fn(ArrayListValue, ArrayListValue) -> i32;
impl ArrayList {
    pub fn new(length: usize) -> *mut ArrayList {
        let length = if length <= 0 { 16 } else { length };
        let mut new_arraylist = Box::new(ArrayList {
            data: std::ptr::null_mut(),
            length: 0,
            _alloced: length,
        });
        let data = unsafe {
            let ptr = libc::malloc(length as usize * std::mem::size_of::<ArrayListValue>()) as *mut ArrayListValue;
            if ptr.is_null() {
                libc::free(Box::into_raw(new_arraylist) as *mut _ return std::ptr::null_mut();
            }
            ptr
        };
        new_arraylist.data = data;
        Box::into_raw(new_arraylist)
    }
    pub fn free(this: *mut ArrayList) {
        if !this.is_null() {
            unsafe {
                libc::free((*this).data);
                libc::free(this as *mut _);
            }
        }
    }
    fn enlarge(&mut self) -> bool {
        let newsize = self._alloced * 2;
        let data = unsafe {
            let ptr = libc::realloc(self.data as *mut _, newsize as usize * std::mem::size_of::<ArrayListValue>()) as *mut ArrayListValue;
            if ptr.is_null() { return false; }
            ptr
        };
        self.data = data;
        self._alloced = newsize;
        true
    }
    pub fn insert(&mut self, index: usize, data: ArrayListValue) -> i32 {
        if index > self.length { return 0; }
        if self.length + 1 > self._alloced && !self.enlarge() { return 0; }
        unsafe {
            let src = self.data.add(index);
            let dest = self.data.add(index + 1);
            libc::memmove(dest as *mut _, src as *const _, (self.length - index) * std::mem::size_of::<ArrayListValue>());
        }
        self.data[index] = data;
        self.length += 1;
        1
    }
    pub fn append(&mut self, data: ArrayListValue) -> i32 {
        self.insert(self.length, data)
    }
    pub fn prepend(&mut self, data: ArrayListValue) -> i32 {
        self.insert(0, data)
    }
    pub fn remove_range(&mut self, index: usize, length: usize) {
        if index > self.length || index + length > self.length { return; }
        unsafe {
            let src = self.data.add(index + length);
            let dest = self.data.add(index);
            libc::memmove(dest as *mut _, src as *const _, (self.length - (index + length)) * std::mem::size_of::<ArrayListValue>());
        }
        self.length -= length;
    }
    pub fn remove(&mut self, index: usize) {
        self.remove_range(index, 1);
    }
    pub fn index_of(&self, callback: ArrayListEqualFunc, data: ArrayListValue) -> i32 {
        for i in 0..self.length {
            if callback(unsafe { *self.data.add(i) }, data) != 0 {
                return i as i32;
            }
        }
        -1
    }
    pub fn clear(&mut self) {
        self 0;
    }
    fn sort_internal(&mut self, compare_func: ArrayListCompareFunc) {
        let list_data = self.data;
        let list_length = self.length;
        let mut pivot = unsafe { *list_data.add(list_length - 1) };
        let mut tmp;
        let mut i let mut list1_length;
        let mut list2_length;
        if list_length <= 1 { return; }
        list1_length = 0;
        for i in 0..list_length - 1 {
            if compare_func(unsafe { *list_data.add(i) }, pivot) < 0 {
                tmp = unsafe { *list_data.add(i) };
                unsafe { *list_data.add(i) = *list_data.add(list1_length); }
                unsafe { *list_data.add(list1_length) = tmp; }
                list1_length += 1 }
        }
        list2_length = list_length - list1_length - 1;
        unsafe { *list_data.add(list_length - 1) = *list_data.add(list1_length); }
        unsafe {